I agree as long as you talk bitcoin. But blockchains are NOT just cryptocurrencies, and not all currencies work as you describe like bitcoin.

BTW, when we have digital USD, say goodbye to your financial freedom. The government can (and will) tax you whenever they want whatever they want for the reasons they want (we need to save the economy, we need to bail out banks, etc.). They can even shut you down completely by closing access to your accounts. Because they will only allow the use of the digital dollar, because they will have full control. A totalitarian regime's dream.

If your argument is “Public ledger blockchains can be just as efficient as traditional databases”

That was never my argument. If you read carefully, there were other arguments I made in context. I just wanted to put it into perspective. Everything uses energy, and comparing things in tech is often very complex because it depends on a zillion factors.

In a blockchain, to make a transaction you need the node and that's it. In traditional client server model, a database on its own rarely does the job, especially if you talk transactions and banking. Hence why web servers and all the other layers very well account and are relevant to store a transaction, otherwise it just doesn't happen. I know because I have done this for a living.

what have you done to actually show that only a public ledger blockchain can solve the problem you’re describing?

What have you done to show it does not? You are only arguing about energy. To date I have yet to see an application where I can send money in sub-seconds to a person in Venezuela which has trouble accessing international markets and censorship by the government. Or creating a tamper-proof land registry which can't be altered by the government or a rich guy in some developing country. Or a database which can't be censored, or shut down by a government or some powerful dude. An application which allowed anyone to create money (even if it's too often misused). Mind you, I am not saying blockchain is good for everything nor that it is the best thing ever invented nor that it does not have problems. Any tech does.

I am sure you will find ways to argue against this, because when someone's mind is made up there's little space, but I am not here to convince you, I just stand my ground and make my case. Have a nice evening.

Your answer isn't good enough either. Aren't you forgetting application servers, web servers, load balancers, Cloudflare, firewalls and all that stuff which allow a database to just use 0.1J? Because if we are talking VISA and banking scale of transactions that's what it takes.

Besides, it's just missing the point. Traditional databases are good and best at what they do - address traditional problems. Blockchains address different problems, so comparing them for completely different use cases won't work. You can compare MySQL vs Oracle vs PostgreSQL that way.

The obvious falsehood is dismissing each blockchain by using bitcoin as a reference. I am NOT talking about bitcoin-style Proof-Of-Work transactions whatsoever. Also, the article you mention is from 2020, where Ethereum was also running Proof-Of-Work, like bitcoin. It doesn't anymore. I don't dispute that bitcoin uses incomparable amounts of energy. If you can't see what I am talking about then thanks for engaging but let's not converse any longer.

Yep, real blockchain know-how here. I answered to this partly here I think (if I am linking correctly) https://slrpnk.net/post/17009217/13027204. The real issue there is how would anyone be prevented to register a new private key as a validator. Hard-wiring that into the hardware creates new problems. So I guess this is the argument where it all could fall apart, just technically. Thanks.

Can't disagree, but then why do we think Solarpunk? To have some nice pictures and inspiring stories?

I thought the same way as validating in Proof-of-Stake works: The devices have a private key (yes there are issues there about securing them for non-authorized access, but they can largely be addressed like also nodes do) which is registered on the blockchain. Then only these registered devices can issue coins. This is critical and there might be a lot of ways this could be hackable, which could or could not be mitigated. However I thought it's not more of a challenge than running say an Ethereum or any other node.

So the primary reason I wrote this post was not to talk about something I am convinced of as a solution, but exactly for people to drill holes and fire everything they have at it. If I don't have the answers, it would not work in real life. So first of all tI am grateful to everyone who is chiming in.

There is a fundamental aversion in Solarpunk circles towards blockchains. I don't want to change that, nor argue against that. The crypto space has earned this aversion all by themselves. There is obvious abuse and misallocation through these concepts.

I am an engineer. I have fought all my life to get a balance between my affinity to tech and the harm we are doing to the planet. But - we can't just all get back to be farmers, can we? I love Solarpunk because it inspires to get to that balance, where we don't need all to go back to bare basics, but use technology for a harmonious life with our host planet.

Technology is a big word. Can we demonize technology in general? Is the Internet bad? Are EVs bad? Are solar panels bad (think of what it takes to create them!). I am sure that is not an issue here, or so I hope.

Blockchains. Again, blockchains are just data structures. Fundamentally, numbers linked to other numbers. Yes, they require energy, but so does the entire Internet. You wouldn't blame the Internet as a whole just because it's used for capitalist maximalization, much more than blockchains are being used for that? Should we stop using it because big corps make most of their money nowadays through the Internet?

Blockchains are also just tools. Yes, most stuff is anti-thetic to Solarpunk. Notwithstanding, I (and many others) believe it has potential to bring about some change. They are fundamentally a more democratic tool because they lower the barrier to entry. Everyone can participate, and nobody can take that away from you. We can argue about democracy too, as democracy per se is a very abstract concept as well, and there are no absolutes nor silver bullets. Every community of any scale has to work it out for themselves, but it's blatantly obvious that what we call today Democracy is a farce.

Associating crypto-technology to "crypto-capitalist tech fetishism" exclusively, however, is, excuse my counter-pun here, which I also present without personal affront, not understanding the technology as such. There are donating platforms built with crypto. There are also dedicated crypto-leftist groups, check out https://www.reddit.com/r/cryptoleftists/ or their discord channel. There are bioregional and regenerative finance projects who channel resources to people doing great (solarpunk) stuff on the ground. There are a lot of many more great ideas based on crypto. A lot of them fail to get attraction, a lot fail altogether as a project, a lot are too idealistic, a lot just fall under the radar, and a lot are useless. A lot could be done without blockchains, or not at all.

I was not trying to convince anyone that this solar crypto stuff IS Solarpunk, I only tried to get feedback to the question if it is a feasible project with some beneficial properties, these being for example to communally govern resources, and providing income to people (what if shanty-towns would have their solar roofs. A game changer for them) while further boosting solar energy generation. Frankly after reading some replies it doesn't look like. I don't mind if people say it is or not Solarpunk, or all the other (always welcomed) dismissing and rejecting critique. The aim was to try to identify if there is merit in even trying. And it looks there isn't, purely based on practical and economical criteria, like some you did point out in your reply.

"Communal, shared infrastructure" is an abstract concept as well. There is a tension rarely talked about, and it is if this means we need to go back living in small village-like communities only. It often sounds like that. Is that really the end game? I am not sure. In that case yes, blockchains and a whole lot of other stuff are superfluous. However, I assume most people writing here live in cities, with a romanticized ideal of what it means to live in small close-knit communities, because they never actually had the chance to do that. I have. And I have lived in cities. The population share living in cities is constantly growing. Most city people want to continue living in cities. So what we do? Can "Communal, shared infrastructure without growth" as a concept be applied to all scales? Maybe it can, and blockchains could be a powerful tool to mediate the transition to that, due to their unique characteristics of accountability, transparency and decentralization.

Or maybe not. That's totally fine.

Yeah bitcoin is obviously not going to look well there. However, that's taking one example and apply to everything, which is inaccurate. Like taking a massive Hummer and take its consumption for every (gas) car in existence.

The blockchain I am talking about wouldn't have such power consumption because it doesn't use mining. I have made allusions of how that works in other comments.

I can't blame you for this sentiment because there is a lot of scamming. So is the current monetary system btw, even at a bigger and blunt scale.

Crypto is just math, what people do with it is something different. It's a tool, and it can be used for good as for bad.

Blockchain is an accounting system first, which happens to underpin a lot of the crypto money space. But it has nothing to do with money per se.

In a future moneyless society, is everyone free to consume as much as they want? Maybe that works, I don't have an answer, but maybe it's also an option to just account for everyone's consumption (maybe in absolute terms, e.g. kWh?), and apply some limits. The disregard of limits is probably the first culprit against sustainability, and this society is not the first in failing there.

Traditional database solutions often don't consume less, because they are centralized and need to account for all the load. Hence they are fat, difficult to maintain and scale, need backup, and run in energy sucking datacenters where you don't have control.

Not even speaking of the data. Subject to hacking, manipulation, gated control, data loss, and a myriad of other problems.

Granted, MOST "problems" being thrown blockchains at are non-issues and just a hype hammer looking for nails, but there are genuine use cases where blockchains DOES solve important issues.